Warp-stop-motion apparatus



Patented Jan. 24, I899.

S U T A R A .P RP EA MN Rm UT 0 M w T 8 P B A W Application filed Oct. 14, 1898.3

(No Model.)

Invert/502"! Geo e ODrapen Mrs STATES rricn.

"ATENT GEORGE O. DRAPER, OF I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

WARP-STOP-MOTION APPARATUS.

SPECIFICATION forming part of Letters Patent No. 618,378, dated January 24, 1899.

' Application filed October 14,1898. Serial No. 693,478. (No model.)

To all whom it may concern:

Be it known that I, GEOBGEZO. DBAPER, of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in WVarp-Stop-Motion Apparatus, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numerals on the drawings rep resenting like parts.

This invention has for its object the production of a novel warp-stop-motion apparatus of that type wherein the engagement and arrest of a normally vibrating feeler is effected by the movement into abnormal position of one of a series of vertically-movable detectors maintained by normal warp-threads in inoperative position, stoppage of the apparatus with which the stop-motion mechanism cooperates being automatically effected by or through the arrest of the feeler.

I have herein provided a novel form of director to cooperate with a released detector due to slackness or failure of its warp-thread and insure its proper positioning to engage and arrest the movement of the feeler, the director during such engagement preventing twisting or bending of the detector and at the same time providing a back-stop to act upon the upright edge of the detector opposite the edge engaged by the feeler.

My invention while herein illustrated as applied to a loom is not restricted to such use, as it may be applied to any form of apparatus for treating warp-threads wherein it is desirable to effect stoppage of the apparatus automatically upon slackness or failure of one of the warp-threads.

Figure 1 is a longitudinal sectional view'of a sufficient portion of a loom to be understood with one embodiment of my invention applied thereto, taken on the line m 00, Fig. 2. Fig. 2 is a partial rear elevation of the apparatus shown in Fig. 1. Fig. 3 is an enlarged detail of the novel part of the mechanism illustrated in Fig. 1. Fig. 4 is an enlarged perspective detail of a part of the directorto suitable brackets M, attached to the loom side. This bar or serves as a stop to limit the descent of a released detector and also to guide said detectors when maintained in inoperative or elevated position .by normal warp-threads as shown in full lines Figs. 1 and 3.

Arock-shaft a is mounted in suitable bearings on the lower part of the brackets M, said rock-shaft having arms ct, to which a feeler a is attached, the feeler being shown as an angle-bar with its continuous longitudinal edge 6 turned toward the detectors, the feeler normally vibrating back and forth below the lower ends of the detectors, the vibration being effected in any suitable manner.

Opposite to the path of movement of the feeler I have mounted the director, herein shown as a plate 9, mounted on the inclined seats m of the brackets M and bent to form a shoulder 9, extended longitudinally along the rear upright edges of the series of detectors, the plate being again bent below the shoulder to form an inclined shelf-like portion 9 having its edge deeply serrated or notched (see Fig. 4) to form a series of bevel-sided teeth g The toothed part of the shelf g extends below the vertical path of movement of the detectors, so that when one of the latter is released by failure or slackness of its warpthread it will descend into dotted-line position (best shown in Fig. 3) between two of the teeth of the shelf, and in such position it will engage and arrest the feeler as the latter moves rearwardly or toward the detectors. At the time of engagement the shoulder g, acting in conjunction with the bottom of the space between the two adjacent teeth, forms a back rest for that upright edge of the detector opposite the edge engaging the feeler.

The teeth between which the released detector stands serve to prevent twisting or bending of the detectors when engaged by the feeler, and the shelf g is inclined, as shown, to aid in directing the lower end of a released detector toward the toothed edge of the shelf to enter between two of the teeth thereof.

Under normal conditions it will be seen that the lower ends of the detectors project below the shoulder g, and I prefer this mode of constructiomas the shoulder will thus serve at all times as a guide for the detectors.

By notchin g or forming teeth along the edge of the shelf g of the director, as herein shown and described, I am enabled to dispense with any milling, roughening, or serration of the edge of the feeler, the object of such roughening or serration in other constructions heretofore devised having been for the purpose of preventing lateral twisting or slipping of the detector out of position when engaging the feeler.

The feeler is moved toward the detectors in such manner that arrest of the feeler is permitted without strain or any tendency of the parts to breakage, the reverse swing of the feeler being effected positively, and for this purpose the mechanism herein shown is very convenient and will be briefly described, although it is to be understood that any other suitable vibrating mechanism may be employed.

The rock-shaft a'is provided with an arm afiextending oppositely to the feeler and having pivotally connected to it a bent arm a provided with a hunter a and a toe (1 the latter cooperating with the cam D on the shaft 0, which is herein shown as the cam-shaft of the loom, the hunter a being thereby moved into and out of the path of one or more tappets f of a cam F, also fast on the shaft 0. Upon arrest of the feeler the hunter 0, will be held up in the path of a tappet, engagment therewith acting to swing the arm a to the rear. The arm a is slotted at a to receive a stud d on a short lever c1 pivoted at its upper end to a link d hooked around the camshaft at (2 while the other end of the link is jointed to the arm 6 of a rock-shaft e This rock-shaft is provided with a knock-0E arm 6 for the shipper-lever, the lower end of the lever (1 and the arm 6 being connected by a rod 6 the joint 0 of which acts as the fulcrum for the lever Z when the hunter (0 is acted upon by the tappet-cam F, the swing of the upper end of said lever at such time moving the link (1 longitudinally to operate the knock-off arm and release the shipperhandle S.

Various changes in the construction and arrangement of the embodiment of my invention herein shown and described may be made without departing from the spirit and scope of my invention.

Having fully described my invention,what

I claim as new, and desire to secure by Letters Patent, is-

1. In a warp-stop-motion apparatus, anormally-vibrating feeler, stopping means operated by or through arrest of the feeler, a director located opposite the feeler, presenting an inclined toothed guide portion, and a se ries of detectors vertically movable between the director and feeler and maintained inoperative by normal warp-threads, a released detector being held by the toothed guide in position to engage and arrest the feeler.

2. In warp-stop-motion apparatus, a normally-vibrating feeler, stopping means operated by or through arrest of the feeler, a plate located opposite the feeler and bent transversely to present a lower, inclined shelf having a toothed edge, and a superposed shoulder substantially above the roots of the teeth, and a series of detectors maintained by normal warp-threads in inoperative position, a released detector being directed by the shoulder and inclined shelf into position between two teeth to be thereby supported when engaging and arresting the feeler.

3. In Warp-stop-motion apparatus, a normally-vibrating feeler, stopping means operated by or through arrest of the feeler, a director located opposite the feeler, presenting an inclined toothed guide portion and a superposed shoulder inset from said por tion, a series of detectors vertically movable between the director and feeler and maintained inoperative by normal warp-threads, the teethof the guide and the shoulder holding a released detector in position to engage and arrest the feeler without being bent or twisted, and a stop to limit the descent of such detector.

at. In warp-stop-motion mechanism, a normally-vibrating feeler, stopping means operated by or through arrest of the feeler, a series of detectors maintained elevated and inoperative by normal warp-threads and adapted to descend into the path of and to arrest the feeler when released by slackness or fail ure of the warp-threads, and a guide-plate opposite and downwardly inclined relative to the path of the feeler and having a toothed edge, the inclination of the guide serving to direct a released detector toward the feeler and between two of the teeth of the guide, to position the detector and prevent twisting when it engages and arrests the feeler.

5. In warp-stop-motion mechanism, a normally-Vibrating feeler, stopping means operated by or through arrest of the feeler, an inclined director located opposite the feeler and bent longitudinally to form a shoulder, the lower edge of the plate extending beyond the latter and provided with teeth or notches,

a series of longitudinally-slotted detectors vertically movable between thefeeler and director and guided by the shoulder of the latter, normal warp-threads maintaining the de-- tectois out of the path of the feeler, a re- In testimony whereof I have signed my leased detector moving into position between name to this specification in the presence of two of the teeth of the detector and being two subscribing witnesses.

held thereby in position to engage and arrest GEORGE O. DRAPER. 5 the feeler, and a stop-bar extended through Vitnesses:

the slots of the detectors, to limit theirmove- E. D. BANOROFT,

ment when released. THEO. B. HASELDEN. 

